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student18481

你好,可否教我以下題目?拜托及謝謝你了

q25 q15

practise q2

Q19

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解答 0

  • student18481
    2020-08-28 01:42:36
    I need q19 only thx
  • 解數雜貨店
    2020-08-28 08:49:01
    19a) Solve x - 3y + 8 = 0 ......(1) 3x + y - 16 = 0 ......(2) bi) Rewrite equation of AB as y = x/3 + 8/3 Slope of AB = 1/3 Slope of CD = Slope of AB Use the coordinates of C and the slope to write the equation bii) The coordinates of D is (x, 0) Plug y=0 into the equation of CD to find x. c) The slope of AD is the same as the slope of BC. The coordinates of A satisfies the equation of AB. Use the above two conditions to find A.
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